Transmission mechanism.



(. Wl TIBBITS.

TRANSMISSION MECHNISM.

APPLICATION FILED 06T. 4. 1913.

, THE NORRIS PEYERS C0.. PHo1v-LITHO.. wAsHlNamN n r nrurnn STATES TRANSMISSION MECHANISM. i

Specification of LettersPatent.

PATENT. onirica. f

GEORGE W. TIBBITS, OF LOS ANGELES, CALIFORNIA.

Patented Apr. c, r1915.

applicati@ filed october 4, 1913.` sepria'l'No. 793,456.

low speeds may be controlled by foot movement.

accompanying drawing, in which- Figure 1 isa vertical section illustrating Y the transmission mechanism. .F ig. 2, is a detail showing the squared portion of the drivingshaft, and Fig. 3, is a detail showing the squared collar mounted on the driving shaft. f Y

Referring to the drawing, 1, designates a case; 2 is an aXle having keyed thereon a bevel gear 3,.-with which a bevel pinion4,

` keyed on a driven shaft5, is in mesh. Said driven shaft 5, is suitably supported within said case 1, in bearings V6 and 7, which are carried by ribs or spiders 8 and 9, integral with the case. On said driven shaft are keyed gears 10 and 11, and a toothed Wheel 12, for high and low speeds, and for reverse, respectively. 13 is a driving shaft mounted in suitable bearings 14 and 15, carried by said ribs ,or spiders 8 and 9, said driving shaft having an enlarged hollow portion 16, for purposes to appear presently, said enlarged hollow portion being squared on the outside for a short distance, as seen at 16, and the balance of the enlarged por-` tion of the shaft being annular. Loosely mounted on the annular portion of said shaft 13, is a gear 17, in mesh with said gear 10, and rigidly secured to a'friction disk 18, also loosely'mounted on the annular portion ofv said shaft. Said friction disk 18, is provided with annular V-shaped grooves 18, and ridges 18" Mounted on the said squared portion- 16 of said shaft 13, is a friction clutch 19, having two friction faces A and B, each provided with annular V- shaped grooves 19 and ridges 19, the face A being arranged to be moved, by means Otherobjects will appear from they fol-` lowing specication in connection with the' presently described, in frictional engage? ment with said friction disk 18, whereby to transmit power from` said shaft 13, through Y gears 17 and 10, to thedriven shaft `5; and said face being arranged to be moved 'in frlctional .engagement with a friction disk 20, provided withannular V-shaped grooves 20 and ridges 20, and loosely mounted on said shaft 13. `Rigidly connected with said ,e friction diskV 20,isa gear 21, which isy Valways in mesh with the gear .11, on the driven shaft.

The friction clutch 19, referred to,being mounted Ion thesquared portion 16 ofsaid shaft, is rotatable therewith, and is capable of longitudinal movement thereon, a pin.-

22 extending through an elongated slot 23, 1n said enlarged squared portion 16, of said shaft 13, connecting said clutch with a shifting plunger 24:disposed land operable within the hollow portion of said shaft, to shift the clutch fon rthe shaftand thereby cause the facesfA and B vto lfrictionally engage with thev friction disks 18 and 20, respectively. On, thev plunge'r24, is a stem 25, which extends through a cap 26, closing the end of the hollow portionof the shaft, and

through the case 1, to an operating mechanism, not shown. About said stem is coiled a spring27, which abutting against said cap 26, and a'tension adjusting nut 28, operable on the threaded portion 29, of said stem 25, is provided to normally. hold the clutch 19, in engagement with the friction disk 18,V of said high speed gear 17. Loosely ymounted on said shaft 13, isatoothed wheel 30, and

a friction disk 31, provided with annular grooves 31 and ridges 31, the disk being bound with said toothed wheel 30 byany suitable means. Said toothed wheel` 30, is connected with said toothed wheel 12, on saiddriven shaft 5, by a chain 32. Ar-

ranged for engagement with the annular grooves and ridges-of the said friction disk 31, to transmit motion thereto and to said toothed wheels 3 0 and 12, is a friction clutch 33, provided with annular V-shaped grooves 33 and ridges 33. Integral with said squared vsleeve 35, keyed to said shaft 13l This friction clutch 33, is slidable longif V'clutch 33, isa hub 34, which lits over a tudinally on said squared sleeve 35, a pin y 36, extending through a slot 37, in said sleeve connecting said friction clutch with said shaft 13. A shifter 38, on the hub 34,

Y of said friction clutch serves to move the friction clutch 33 in and out of engagement with said friction disk 3l.

What l claim, is

l. A driven shaft, variable speed gears keyed thereon, a driving shaft having an enlarged hollow portion, a high speed gear loose on said enlarged portion of said driving shaft and in mesh with one of the gears on said driven shaft, a clutch disk connected with said high speed gear, a low speed gear loose on said driving shaft in mesh with another of the gears on said driven shaft, a clutch disk connected with said llow speed gear, a two faced clutch disk on said enlarged portion of said driving shaft and between the clutch disks of said high and low speed gears, a means extending through said hollow portion of said driving shaft and connected with said two faced clutch disk to shift same thereon, a toothed wheel keyed on said driven shaft, a toothed wheel loose on said driving shaft,a chain connecting said toothed wheels, a disk clutch connected with the toothed wheel on said driving shaft, a disk clutch keyed on said driving shaft and shiftable to engage the clutch on said toothed wheel, and means to operate said clutch.

2. A driven shaft, variable speed gears keyed thereon, a driving shaft having an enlarged hollow7 portion, a high speed gear loose on the enlarged portion of said shaft and in mesh with one of the gears on said driven shaft, a clutch disk connected with said high speed gear, a low speed gear loose on said driving shaft in mesh with another of the gears on said driven shaft, a clutch disk connected with said low speed gear, a two faced clutch disk on said enlarged portion of said shaft and between the clutch disks of said high and low speed gears, a

plunger extending through said enlarged portion to move said two faced clutch thereon, a toothed wheel keyed on said driven shaft, a toothed wheel loose on said driving shaft, a chain connecting said toothed wheels, a disk clutch connected with the toothed wheel on said driving shaft, a disk -keyed on said driving shaft to engage the ing shaft in mesh with another of said gears on said driven shaft, a clutch disk connected with said low speed gear, a two faced clutch disk on said enlarged portion of said shaft and between the clutch disks of said high and low speed gears, a plunger extending through said enlarged portion to move said two faced clutch thereon, a spring engaging said plunger to canse said two faced clutch to be held in engagement with the friction disk of said high speed gear, a toothed wheel keyed on said driven shaft, a toothed wheel loose on said driving shaft, a chain connecting said toothed wheels, a disk clutch connected with the toothed wheel on said driving shaft, a disk keyed on said driving shaft to engage the clutch on said toothed wheel, and means to operate said disk.

In testimony whereof I have set my hand in the presence of two witnesses.

GEORGE W. TIBBITS. `Witnessesz ANTON GLOETZNER, Jr., E. L. S'irLwELL.

G'opes of this patent may be obtained for rive cents each, by addressing the Commissioner of Patents,

Washington, D. C.

fil 

